APPARATUS FOR DRIVING VOLTAGE CONTROLLED SWITCHING ELEMENTS
First Claim
1. An apparatus for driving a voltage controlled switching element having a conduction control terminal, comprising:
- voltage determining means for determining whether or not voltage at the conduction control terminal is at a first voltage which is lower than a second voltage and which is equal to or more than a threshold voltage, the second voltage being a voltage provided when the switching element is in a normal on-state thereof, the threshold voltage being to voltage at which the switching element is switched on; and
forcible switching-off means that forcibly switches off the switching element when it is determined by the voltage determining means that the voltage at the conduction control terminal is at the first voltage.
1 Assignment
0 Petitions
Accused Products
Abstract
An apparatus is provided to drive a voltage controlled switching element having a conduction control terminal. In the apparatus, it is determined whether or not voltage at the conduction control terminal is at a first voltage which is lower than a second voltage and which is equal to or more than a threshold voltage. The second voltage is a voltage provided when the switching element is in a normal on-state thereof. The threshold voltage is voltage at which the switching element is switched on. When it is determined that the voltage at the conduction control terminal is at the first voltage, the switching element is forcibly switched off.
29 Citations
15 Claims
-
1. An apparatus for driving a voltage controlled switching element having a conduction control terminal, comprising:
-
voltage determining means for determining whether or not voltage at the conduction control terminal is at a first voltage which is lower than a second voltage and which is equal to or more than a threshold voltage, the second voltage being a voltage provided when the switching element is in a normal on-state thereof, the threshold voltage being to voltage at which the switching element is switched on; and forcible switching-off means that forcibly switches off the switching element when it is determined by the voltage determining means that the voltage at the conduction control terminal is at the first voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
Specification